Wrench.



PATENTED OCT.` 22 1907.

C. L. HENDERSON.

' WRENCH.l APPLIOATION FILED DB0. 6, 180e.

2 SHEETS-SHEET 2.

CHARLES LEWIS HENDERSON, OF WOODSTOCK, ONTARIO, CANADA.

WRENCH.

Specification of Letters Patent.

Patented Oct. 22, 1907i Application filed December 5, 1906. Serial No. 346,476.

To all whom 'it 'may concern.'

Be it known that I, CHARLES. LEWIS HENDERSON, of the city oi Woodstock, in the county oi Oxford and Province oi Ontario, Dominion of Canada, have invented certain new and useful Improvements in Wrenches; and l hereby declare that the following is a iull, clear, and exact description oi the same.

This invention relates to a wrench having a movable jaw which can bo quickly adjusted to the stationary jaw and autoniatieally tightened against the work as the jaws are locked in their set position.

The invention further relates to the peculiar construction of the locking and tightening' mechanism for the movable jan', and to the means for multiplying the power applied to hold the jaws in their set position.

For a iull understanding oi the invention reference is to be had to the following description and to the accompanying drawings in which,

Figure l, is a perspective view oi' the wrench showing the external appearance of the parts. Fig. 2, is a sectional view oi the wrench showing the normal position ol' the parts. Fig.` 3, is a similar view to Fig. 2, with the parts positioned to hold the movable jaw against the work. Fig. 4, is a detail view on a larger scale than the preceding views oi the locking and tights cning mechanism lor the movable jaw. Fig. 5, is a perspective sectional view of the articulating member. Fig. (i, is a detail view of the stationary jaw. Fig. 7, is a detail view ol' the movable jaw. Fig. 8, is a detail view oi the pivotcd hand grip.

Like letters ol reference refer to like parts through-l out the specication and drawings.

Forming part ol' the Wrench is a body bar f having at one end a fixed jaw f/ and at the other end a hand grip q and a resisting piece Z at the junction of the hand grip q with the adjacent end of the body bar. Formed in the body `bar f is a slideway h extending from the fixed jaw f inwardly towards the resisting piece Z. Contained in the slideway 71. is the shank b oi the inevable jaw a. Formed in the shank b is an elongated slot b and extending through the slot b is a pin b held by the walls` ol the body bar, and formed on the rear lace oi the shank b are detent teeth c. Formed through the rear wall ol: the body bar f is an aperture f through which the detent teeth c are accessible. lnclosing the rear and side walls of the body bar is the articulating member e iulcrumed to the body bar by the iulcrum pin u. at a place adjacent to the fixed jaw f. The articulating member c extends from the inlcrurn pin a to a place beyond the resisting piece Z. Opposed to the aperture f is a detent dog d having its lace adjacent to the shank provided with a series ol' detent teeth d to engage with the detent teeth c. Formed in the detent dog Z is a socket d and contained in the socket d is the ball e oi the pivoted arm c ulcrumed to the articulating member e and arranged to position the detent dog so that its detent teeth will engage with the detent teeth c.

Bearing against the detent dog d andthe adjacent part of the articulating member e is a spring z to hold the detent dog positioned to enable its detent teeth to engage with the detent teeth c during the actuation of the articulating member: -Formed in the body bar f below the slideway h is a recess h extendinginwardly into the body bar from the rear wall thereof and contained in the recess h is a guide pin s. The articulating member e is provided with a guide tube s/ which telescopes on the pin s and coiled on the pin s and tube s/ is a spring s to normally press the articulating member away from the body bar to cause the disengagement of the teeth of theV detent dog with the detent teeth o the shank of the movable jaw. Fulcrumed to the free end of the articulating member e is a hand lever m the fulcrum pin m of which passes through the hand lever in the vicinity of its toe m. The toe m engages with the resisting tace Z/ of the resisting piece Z to cause the inward movement oi the articulating member to bring the teeth of the detent dog into en gagcment with the detent teeth oi the shank ol the` movable jaw. The resisting iace Z/ of the resisting piece l' is inclined rearwardly and outwardly from the body bar to iacilitate the sliding movement oi the lever toe thereon as the articulating member closes against the body bar. 4

The operation oi the invention is as follows-The movable jaw a is extended while the parts are in the position shown in Fig. l, to enable the jaws to straddle the work. The movable jaw is then closed while the parts are in the' same position until both jaws are in contact with the work. The hand lever m is then pressed towards the hand grip q and this movement of the hand lever causes the articulating member e to swing in an arc towards the body bar f and bring the detent teeth of the detent dog into engagement with the detent teeth of the shank. As the articulating member swings towards the body bar the first tooth l"L oi the detent dog, engages with the alined detent tooth c of the shank and as the articulating member continues its'movement the pivoted arm e brings the rcmaining teeth of the detent dog into engagement with the alined detent teeth of the-shank. All the detent teeth of the detent dog are then in engagement with a corresponding number of the detent teeth 0i the shank, and the continued movement of the articulating member carries the detent dog in a curvilinear plane and thus presses the shank towards the inner en'd oi the slideway to intensify the bite of the jaws on the work. When the pressure on the hand lever is released the articulating member returns to its normal position under the influence of the spring s and releases the shank ol' the movable jaw from engagementV with the teeth of the detent dog, When the articulating member is in this position the movable jaw is free to move outwards or inwards The outward movement o the movable jaw is limited by the pin b engagingwith the end oi the slot b and the outward movement ol the articulating member is limited by the engagement of the toe of the hand lever m with a stop o at the outer end of the resisting piece Z.

The holding power exerted on the detent dog is equal to the combined length of the articulating member and hand lever multiplied by the applied power divided by the distance of the detent dog from the iulcrum, and this holding power is intensified by the engagement of the hand lever with the resisting face ofthe resisting piece.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent is:

1. A wrench comprising a body bar having a slideway lengthwise therein, with an aperture in one of its walls communicating with the slideway, a stationary jaw at one end of the body bar, a hand grip at the opposite end. a resisting piece at the junction of the hand grip and body bar having a smooth inclined surface, a movable jaw, a shank for the movable jaw movable lengthwise in the slideway, detent teeth for the shank, an articulating member fulerumed to the body bar, a detent dog carried. by the articulating member and movable through the aperture in the body bar having detent teeth to engage with the detent teeth ot the shank, and a hand lever crumed to the free end of the articulating member, and slidably engaging with the inclined surface of the resisting piece.

2. A wrench comprising a body bar having a slideway lengthwise therein, with an aperture in one of its walls communicating with the slideway, a stationary jaw at one end of the body bar, a hand grip at the oppositeend a resisting piece at the junction of the hand grip and body bar having a smooth inclined surface, a movable jaw, a shank for the movable jaw movable lengthwise in the slideway, detent teeth for the shank, an articulating member fulcrumed to the body bar, a detent dog having tul-A a series of detent teeth to engage with the detent teeth of the shank, an arm pivoted to the articulating member. and to the detent dog, and a hand lever tulcrumed to the free end of the articulating member slidably engaging with the inclined surface of the resisting piece. Y

3. wrench comprising a body bar, having a slideway lengthwise therein, with an aperturerin one of its walls communicating with the slideway, a stationary jaw at one end of the body bar, a hand grip at the opposite end, a resisting piece at the junction of the hand grip and body bar having a smooth inclined surface, a movable jaw a shank for the movable jaw, movable lengthwise in the slideway, detent teeth for the shank, an articulating member fulcrumcd to the body bar, a detent dog, an arm pivotally connecting the detent dog with the articulating member, a spring to restore the articulating member and detent dog to their normal position when relieved of the actuating power, and a hand lever fulcrumcd to the free end of the articulating member slidably engaging with the inclined surface of the resistingr piece,

4. A wrench comprising a body bar, having a slideway lengthwise therein, with an aperture in one of its walls communicating with the slideway, a stationary jaw at one end of the body bar, a hand grip at the opposite end, a resisting piece at the junction of the hand grip and body bar having an inclined surface, a movable jaw, a shank for the movable jaw movable lengthwise in the slideway, detent teeth for the shank, an articulating member fulcrumed to the body bar, a detent dog having a series ot' detent teeth to engage with the detent teeth of the shank, an arm pivoted to the articulating member, and to the detent dog, a spring engaging the detent dog, and the artimilating,r member to hold the detent dog positioned to engage with the detent teeth of the shank, a spring to restore the articulating member and detent dog to their normal position when relieved of the actuating power, and a lever fulcrumed to the articulatingl member and slidably engaging with the inclined surface of the resisting piece.

Woodstock, November 24th. A. D. 1906.

cuirs. Lnwis HnNDERsoN.

Signed in the presence of- A, M. YOUNG, J. G, WALLACE. 

